Fig. 4: Pressure versus temperature phase diagrams of pristine and irradiated CsV3Sb5.
From: Bulk evidence of anisotropic s-wave pairing with no sign change in the kagome superconductor CsV3Sb5
a, e, i Ļ(T) curves below 200 K at several pressures for the pristine (a), 4.8 (e), and 8.6 (i) C/cm2 irradiated samples. Arrows indicate the CDW transitions determined from the dĻ/dT curves in b, f, j. b, f, j Temperature dependence of dĻ/dT below 100 K for the pristine (b), 4.8 (f), and 8.6 (j) C/cm2 irradiated samples. Arrows indicate the CDW transitions. c, g, k Low-temperature Ļ(T) curves below 10 K at several pressures for the pristine (c), 4.8 (g), and 8.6 (k) C/cm2 irradiated samples. Note that the resistivity at 2.38āGPa does not reach zero at low temperatures in g. This may come from distortion such as microcracks to the sample and damage to the terminals caused by solidification of daphne 7373 above 2 GPa. d, h, l P-T phase diagrams of the pristine (d), 4.8 (h), and 8.6 (l) C/cm2 irradiated samples. For clarity, Tc is doubled. The phase diagram of the pristine sample includes data from Chen et al.35. The CDW (superconducting (SC)) phase is shaded in blue (red). Note that the double superconducting dome becomes broader for the irradiated samples. In the intermediate pressure region between P1 and P2, a significant broadening of the superconducting transition has been observed, and Tc shows a strong sample dependence35, 36. These behaviors indicate that the superconducting state in the intermediate pressure region is inhomogeneous and sensitive to the microscopic disorder within the crystal. Therefore, the broadening of the double superconducting dome may come from the introduction of disorders.
